Question

a rectangle has area 60m^2. express the perimeter of the rectangle as a function of its width.

Answer 1

whats the formula for the area of a rectangle..?

Answer 2

Area = Length X Width

Answer 3

great so A = lw

you know A

so 60 = lw

the question is asking you to make w the subject

Answer 4

how do I do that?

Answer 5

perimeter = 2W + 2L

Answer 6

well if 60 = lw

divide both sides of the equation by w

what do you get

Answer 7

60/w=L

Answer 8

great now substitute it into the perimeter formula for L

Answer 9

perimeter=2w+2(60/w)

Answer 10

yes... and it can be simplified to

P = 2w + 120/w

Answer 11

is this the answer?

Answer 12

I think so.... how do you feel about it...

Answer 13

I think is fine Thank you :)

Answer 14

glad to help